CY7C194B-25VC Cypress Semiconductor Corp, CY7C194B-25VC Datasheet - Page 7

• Manufacturer Part Number: CY7C194B-25VC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C194B-25VC

• Density: 256Kb
• Access Time (max): 25ns
• Sync/async: Asynchronous
• Architecture: Not Required
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 5V
• Address Bus: 16b
• Package Type: SOJ
• Operating Temp Range: 0C to 70C
• Number Of Ports: 1
• Supply Current: 80mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 24
• Word Size: 4b
• Number Of Words: 64K
• Lead Free Status / Rohs Status: Not Compliant

Document #: 38-05409 Rev. *A
AC Electrical Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Notes:
Notes:
Parameter
RC
AA
OHA
ACE
DOE
LZOE
HZOE
LZCE
HZCE
PU
PD
WC
SCE
AW
HA
SA
PWE
SD
HD
HZWE
LZWE
6. At any given temperature and voltage condition, t
7. The internal write time of the memory is defined by the overlap of CE LOW and WE LOW. CE and WE must be LOW to initiate a write, and the
transition of any of these signals can terminate the write. The input data set-up and hold timing should be referenced to the leading edge of the signal
that terminates the write.
8. t
HZOE
, t
HZCE
Read Cycle Time
Address to Data Valid
Data Hold from Address
Change
CE to Data Valid
OE to Data Valid
OE to Low Z
OE to High Z
CE to Low Z
CE to High Z
CE to Power-up
CE to Power-down
Write Cycle Time
CE to Write End
Address Set-up to Write End
Address Hold from Write
End
Address Set-up to Write
Start
WE Pulse Width
Data Set-Up to Write End
Data Hold from Write End
WE LOW to High Z
WE HIGH to Low Z
, t
HZWE
are specified as in part (b) of the A/C Test Loads. Transitions are measured ± 200 mV from steady state voltage
Description
2 6 7 8
HZCE
Min
12
12
is less than t
–
3
–
–
0
–
3
–
0
–
9
9
0
0
8
7
0
–
3
12 ns
LZCE
Max
12
12
12
–
–
–
5
–
–
–
–
–
–
–
–
6
6
–
5
–
–
, t
HZOE
is less than t
Min
15
15
10
10
–
3
–
–
0
–
3
–
0
–
0
0
9
8
0
–
3
LZOE
15 ns
, and t
Max
15
15
15
HZWE
–
–
7
–
7
–
7
–
–
–
–
–
–
–
–
–
7
–
is less than t
Min
25
25
18
20
18
10
–
3
–
–
0
–
3
–
0
–
0
0
0
3
-
LZWE
25 ns
for any given device.
CY7C194B
CY7C195B
Max
25
25
10
10
10
25
10
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Page 7 of 13
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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